Sorry, still not buying it… The 4% increase is not a 4% increase on the entire income where the income exceeds $250,000, it’s only on that portion which exceeds $250,000.
If your income is $300,000, your tax only goes up 4% on $50,000 (or about $2,000 on a $300,000 total income! And that “uncertainty” crap has been proven total BS so often, I don’t know why they keep bringing it up. In our economic system, there is ALWAYS uncertainty!!! It’s a fact of life in capitalism!